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1 <br /> Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Former Unocal Service Station#2859 ;! <br /> 1665 Pacific Avenue <br /> Stockton, California <br /> i <br /> FXPI.ANATTON';, <br /> Groundwater monitoring data and laboratory analytical results prior to March 6, 1998, were compiled from reports prepared by MPDS Services, Inc <br /> TOC = Top of Casing elevation B = Benzene ppb = Parts per billion <br /> DTW = Depth to Water T = Toluene ND = Not Detected <br /> (ft) = Feet E = Ethylbenzene = Not Measured/Not Analyzed i <br /> GWE = Groundwater Elevation X = Xylenes D = Duplicate it <br /> i <br /> msl = Relative to mean sea level MTBE = Methyl tertiary butyl ether EB = Equipment Blank it <br /> TPH(G) = Total Petroleum Hydrocarbons as Gasoline <br /> * TOC elevations have been surveyed relative to mean sea level On February 10, 1999, TOC measurements were re-surveyed relative to City of Stockton BM#24, ms] <br /> i Laboratory report indicates the hydrocarbons detected appeared to be a gasoline and non-gasoline mixture <br /> Laboratory report indicates the hydrocarbons detected did not appear to be gasoline <br /> s � <br /> Detection limit raised Refer to analytical reports <br /> ° MTBE by EPA Method 8260 J! <br /> 5 Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 6 Laboratory report indicates gasoline and unidentified hydrocarbons >C8 <br /> 7 Well development only <br /> s Laboratory report indicates gasoline and unidentified hydrocarbons C6-C12 71 <br /> 9 Laboratory report indicates discrete peaks V <br /> I <br /> i0 Laboratory report indicates gasoline C6-C12 p <br /> ANALYTICAL METHODS. <br /> EPA Method 8015 for TPH(G) <br /> EPA Method 8020 for BTEX and MTBE except where noted <br /> EPA Method 8260 for MTBE where noted <br /> {I <br /> �I <br /> d <br /> o <br /> u <br /> 2959 x11954 9 ! As 0122199 <br />